Samsung W299 Duos hard reset
Try firmware upgrade with SAMSUNG PC Studio PC Sync app
Try THIS METHOD to hard reset your Samsung W299 Duos phone: Enter *2767*3855#. Warning! All your data including contacts, messages etc. will be lost! Copy all your necessary data/Contacts/Messages etc. to SIM or make backup to your PC before full reset! Take out SIM card before full reset.
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